/Engine/Plugins/Developer/Concert/ConcertMain/Source/ConcertServer/Public/IConcertServer.h
Destroy a live or archived Concert server session. The server automatically detects if the specified session Id is a live or an archived session.
true if the session was found and destroyed
bool DestroySession ( const [FGuid](API\Runtime\Core\Misc\FGuid) & SessionId, [FText](API\Runtime\Core\Internationalization\FText) & OutFailureReason )